For the Stikine main-stem sockeye stock, relationships of terminal run estimates to patterns of distribution and timing are examined. Such is inclusive of the aerial survey of six sockeye salmon spawning indices to serve as ancillary escapement information.
For Stikine River coho salmon there remains a lack of reliable escapement, marine survival and U.S. harvest data. As a result, the annual run size cannot be quantified. Therefore, the aerial survey of six coho index sites provides at least some indication of return size compared to rough estimations of historical average.
N18-I13 Stikine sockeye and coho aerial surveys Report 2018